Patents by Inventor Veroslava Rihakova

Veroslava Rihakova has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 6-Amino-1-hydroxyhexylidene diphosphonic acid, salts and a process for production thereof
    Patent number: 4304734
    Abstract: 6-amino-1-hydroxyhexylidene diphosphonic acid (I), salts of acid (I), and a process for the production thereof. Acid (I) has the summary formula ##STR1## Acid (I) and its salts are useful for pharmocologial purposes. In the production of acid (I) a mixture of phosphorous acid and phosphorous trichloride is reacted with the .epsilon.-aminocaproic acid or amide derived therefrom at a temperature from 50.degree. to 150.degree. C. The reaction can be carried out in the presence of an organic solvent, preferably chlorobenzene. Salt of the acid is produced by neutralization with one or two molecular equivalents of alkaline hydroxide, preferably sodium hydroxide.
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: December 8, 1981
    Assignee: Vysoka skola chemicko-technologicka
    Inventors: Jiri Jary, Veroslava Rihakova, Alena Zobacova